I have seen a lot of people talking about using strollers for older kids also. It would be strange to think about my 7 year old in a stroller, but is it a good idea to rent one? It will be our first trip.
If it would be strange for you to think about your 7 year old in a stroller, you've kind of already answered your own question. Pre-renting one likely wouldn't be for you.
My DD was 7 on her first trip. I had perused these boards extensively as well as **************.net and touring books regarding touring the parks. You know your own child's cues for tiredness. A PP was on the mark. If they are truly that exhausted to get around, go...go back to your hotel. Take a break. It isn't worth it. I saw so many meltdowns from parents trying to push their little kids (& most were in strollers & were so little and it was like 10pm) to the breaking point because they wanted to get the most out of their vacation and I get it, WDW is expensive, but to what end does one rationalize this is a good idea? I had to be cognizant because I can be commando, too, but you have to just reign it in if that isn't your kid. It can be a challenge because you get caught up in what I call the "Disney effect."
If they get tired, take a break. Ride PeopleMover, Carousel of Progress and other restful attractions. It's amazing what even 15 -20 minutes can do. Like I said before, my DD was having a blast just watching BTMRR and I kept wanting to go to the "next thing." Then I realized, she was having fun. Why drag her away to go "have fun" somewhere else? One really good tip..if you find yourself at one end of the park and they are done or tired....hop on the railroad to the front of the park, then it is a short walk to the buses or monorail.
There are sooooo many strollers at WDW. It would be a hassle for ME, but may not another. Granted for wee ones or a child with a physical challenge, it may be a necessity, but if your 7 year old is an average 7 year old, I'd hold off on the pre-rental, you can always get one in a pinch, if you feel you really must have it. I don't know many 7 year olds who would fit or even get in it. My DD would be in the category that we were treating her like a baby. To each their own. I have no judgment and frankly don't notice the age of kids in strollers. I'm too busy looking at all that is DisneyWorld! Personally, I just wouldn't want the added issue with maneuvering a stroller through the masses if I didn't have "littles" -- that sounds like work to me.
I, too, take a change of shoes in my pack for DD. A good, back saving back is key. Mine isn't big, but is user friendly and holds enough to get through a day. Water is key, too. Dehydration adds to excessive tiredness. Good shoes, good shoes, good shoes.
I guess, in summary, after my soapbox, I'd say, hold off on the pre-rental, then take it day by day. If you need to get one, get it and phooey on anybody who may take note. They don't know your story. This is a very hot topic and by hot, I don't mean popular, on this board, so....
One good piece of advice I got was they won't know what they are missing if you miss doing/seeing/ going on something.